server/server/rune.C

/*
    CrossFire, A Multiplayer game for X-windows

    Copyright (C) 2003 Mark Wedel & Crossfire Development Team
    Copyright (C) 1992 Frank Tore Johansen

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

    The authors can be reached via e-mail at <crossfire@schmorp.de>
*/

#include <global.h>
#ifndef __CEXTRACT__
# include <sproto.h>
#endif
#include <spells.h>


#ifndef sqr
# define sqr(x) ((x)*(x))
#endif


/*  peterm:  
 *  write_rune:
 *  op:  rune writer
 *  skop: skill object used for casting this rune
 *  dir:  orientation of rune, direction rune's contained spell will
 *          be cast in, if applicable
 *  inspell: spell object to put into the rune, can be null if doing
 *    a marking rune.
 *  level:  level of casting of the rune
 *  runename:  name of the rune or message displayed by the rune for
 *              a rune of marking 
 */

int
write_rune (object *op, object *caster, object *spell, int dir, const char *runename)
{
  object *tmp, *rune_spell, *rune;
  char buf[MAX_BUF];
  mapstruct *m;
  sint16 nx, ny;

  if (!dir)
    {
      dir = 1;
    }

  nx = op->x + freearr_x[dir];
  ny = op->y + freearr_y[dir];
  m = op->map;

  if (get_map_flags (m, &m, nx, ny, &nx, &ny))
    {
      new_draw_info (NDI_UNIQUE, 0, op, "Can't make a rune there!");
      return 0;
    }
  for (tmp = get_map_ob (m, nx, ny); tmp != NULL; tmp = tmp->above)
    if (tmp->type == RUNE)
      break;

  if (tmp)
    {
      new_draw_info (NDI_UNIQUE, 0, op, "You can't write a rune there.");
      return 0;
    }

  if (spell->other_arch)
    {
      rune_spell = arch_to_object (spell->other_arch);
    }
  else
    {
      /* Player specified spell.  The player has to know the spell, so
       * lets just look through the players inventory see if they know it
       * use the item_matched_string for our typical matching method.
       */
      int bestmatch = 0, ms;

      if (!runename || *runename == 0)
        {
          new_draw_info (NDI_UNIQUE, 0, op, "Write a rune of what?");
          return 0;
        }

      rune_spell = NULL;
      for (tmp = op->inv; tmp; tmp = tmp->below)
        {
          if (tmp->type == SPELL)
            {
              ms = item_matched_string (op, tmp, runename);
              if (ms > bestmatch)
                {
                  bestmatch = ms;
                  rune_spell = tmp;
                }
            }
        }
      if (!rune_spell)
        {
          new_draw_info_format (NDI_UNIQUE, 0, op, "You don't know any spell named %s", runename);
          return 0;
        }
      if (rune_spell->skill != spell->skill)
        {
          new_draw_info_format (NDI_UNIQUE, 0, op, "You can't cast %s with %s", &rune_spell->name, &spell->name);
          return 0;
        }
      if (caster->path_denied & spell->path_attuned)
        {
          new_draw_info_format (NDI_UNIQUE, 0, op, "%s belongs to a spell path denied to you.", &rune_spell->name);
          return 0;
        }
      if (caster_level (caster, rune_spell) < rune_spell->level)
        {
          new_draw_info_format (NDI_UNIQUE, 0, op, "%s is beyond your ability to cast!", &rune_spell->name);
          return 0;
        }
      if (SP_level_spellpoint_cost (caster, rune_spell, SPELL_MANA) > op->stats.sp)
        {
          new_draw_info (NDI_UNIQUE, 0, op, "You don't have enough mana.");
          return 0;
        }
      if (SP_level_spellpoint_cost (caster, rune_spell, SPELL_GRACE) > op->stats.grace)
        {
          new_draw_info (NDI_UNIQUE, 0, op, "You don't have enough grace.");
          return 0;
        }
      op->stats.grace -= SP_level_spellpoint_cost (caster, rune_spell, SPELL_GRACE);
      op->stats.sp -= SP_level_spellpoint_cost (caster, rune_spell, SPELL_MANA);
    }
  /* already proper rune.  Note this should only be the case if other_arch was set */
  if (rune_spell->type == RUNE)
    {
      rune = rune_spell;
    }
  else
    {
      rune = get_archetype (GENERIC_RUNE);
      sprintf (buf, "You set off a rune of %s\n", &rune_spell->name);
      rune->msg = buf;
      tmp = get_object ();
      copy_object (rune_spell, tmp);
      insert_ob_in_ob (tmp, rune);
      if (spell->face != blank_face)
        rune->face = spell->face;
    }
  rune->level = caster_level (caster, spell);
  rune->stats.Cha = rune->level / 2;    /* the invisibility parameter */
  rune->x = nx;
  rune->y = ny;
  rune->map = m;
  rune->direction = dir;        /* where any spell will go upon detonation */
  set_owner (rune, op);         /* runes without need no owner */
  set_spell_skill (op, caster, spell, rune);
  insert_ob_in_map (rune, m, op, 0);
  return 1;

}


/*  move_rune:  peterm
  comments on runes:
    rune->level     :       level at which rune will cast its spell.
    rune->hp        :       number of detonations before rune goes away
    rune->msg       :       message the rune displays when it goes off
    rune->direction :       direction it will cast a spell in
    rune->dam       :       damage the rune will do if it doesn't cast spells
    rune->attacktype:       type of damage it does, if not casting spells
    rune->other_arch:       spell in the rune
    rune->Cha       :       how hidden the rune is
    rune->maxhp     :       number of spells the rune casts
*/

void
move_rune (object *op)
{
  int det = 0;

  if (!op->level)
    {
      return;
    }                           /* runes of level zero cannot detonate. */
  det = op->invisible;
  if (!(rndm (0, MAX (1, (op->stats.Cha)) - 1)))
    {
      op->invisible = 0;
      op->speed_left -= 1;
    }
  else
    op->invisible = 1;
  if (op->invisible != det)
    update_object (op, UP_OBJ_FACE);
}


/*  peterm: rune_attack
 * function handles those runes which detonate but do not cast spells.  
 */


void
rune_attack (object *op, object *victim)
{
  if (victim)
    {
      hit_player (victim, op->stats.dam, op, op->attacktype, 1);

      if (victim->destroyed ())
        return;

      /*  if there's a disease in the needle, put it in the player */
      if (HAS_RANDOM_ITEMS (op))
        create_treasure (op->randomitems, op, 0, (victim->map ? victim->map->difficulty : 1), 0);

      if (op->inv && op->inv->type == DISEASE)
        {
          object *disease = op->inv;

          infect_object (victim, disease, 1);
          remove_ob (disease);
          free_object (disease);
        }
    }
  else
    hit_map (op, 0, op->attacktype, 1);
}

/*  This function generalizes attacks by runes/traps.  This ought to make
 *  it possible for runes to attack from the inventory, 
 *  it'll spring the trap on the victim.
 */
void
spring_trap (object *trap, object *victim)
{
  object *env;
  rv_vector rv;
  int i;

  /* Prevent recursion */
  if (trap->stats.hp <= 0)
    return;

  if (QUERY_FLAG (trap, FLAG_IS_LINKED))
    use_trigger (trap);

  /* Only living objects can trigger runes that don't cast spells, as
   * doing direct damage to a non-living object doesn't work anyway.
   * Typical example is an arrow attacking a door.
   */
  if (!QUERY_FLAG (victim, FLAG_ALIVE) && !trap->inv && !trap->other_arch)
    return;

  trap->stats.hp--;             /*decrement detcount */

  if (victim && victim->type == PLAYER)
    new_draw_info (NDI_UNIQUE, 0, victim, trap->msg);

  /*  Flash an image of the trap on the map so the poor sod
   *   knows what hit him.  
   */
  env = object_get_env_recursive (trap);

  /* If the victim is not next to this trap, don't set it off.
   * players shouldn't get hit by firing arrows at a door for example.
   * At the same time, the trap will stick around until detonated
   */
  get_rangevector (env, victim, &rv, 0);
  if (rv.distance > 1)
    return;

  trap_show (trap, env);

  /* Only if it is a spell do we proceed here */
  if ((trap->inv && trap->inv->type == SPELL) || (trap->other_arch && trap->other_arch->clone.type == SPELL))
    {

      if (trap->destroyed ())
        return;

      // breaks summon golem spells, which, for inexplicable reasons,
      // do not work like summon golem spells at all but still require
      // direction "0" to work at all.
      //if (trap->direction)
      //  rv.direction = trap->direction;

      for (i = 0; i < MAX (1, trap->stats.maxhp); i++)
        {
          if (trap->inv)
            cast_spell (env, trap, trap->direction, trap->inv, NULL);
          else
            {
              object *spell = arch_to_object (trap->other_arch);

              cast_spell (env, trap, trap->direction, spell, NULL);
              free_object (spell);
            }
        }
    }
  else
    {
      rune_attack (trap, victim);
      if (trap->destroyed ())
        return;
    }

  if (trap->stats.hp <= 0)
    {
      trap->type = SIGN;        /* make the trap impotent */
      trap->stats.food = 20;    /* make it stick around until its spells are gone */
      SET_FLAG (trap, FLAG_IS_USED_UP);
    }
}

/* dispel_rune:  by peterm  
 * dispels the target rune, depending on the level of the actor
 * and the level of the rune  risk flag, if true, means that there is
 * a chance that the trap/rune will detonate 
 */
int
dispel_rune (object *op, object *caster, object *spell, object *skill, int dir)
{
  object *tmp, *tmp2;
  int searchflag = 1, mflags;
  sint16 x, y;
  mapstruct *m;

  x = op->x + freearr_x[dir];
  y = op->y + freearr_y[dir];
  m = op->map;

  mflags = get_map_flags (m, &m, x, y, &x, &y);

  /* Should we perhaps not allow player to disable traps if a monster/
   * player is standing on top? 
   */
  if (mflags & P_OUT_OF_MAP)
    {
      new_draw_info (NDI_UNIQUE, 0, op, "There's nothing there!");
      return 0;
    }

  for (tmp = get_map_ob (m, x, y); tmp != NULL; tmp = tmp->above)
    {
      if (tmp->type == RUNE || tmp->type == TRAP)
        break;

      /* we could put a probability chance here, but since nothing happens
       * if you fail, no point on that.  I suppose we could do a level
       * comparison so low level players can't erase high level players runes.
       */
      if (tmp->type == SIGN && !strcmp (tmp->arch->name, "rune_mark"))
        {
          remove_ob (tmp);
          free_object (tmp);
          new_draw_info (NDI_UNIQUE, 0, op, "You wipe out the rune of marking!");
          return 1;
        }

      /* now search tmp's inventory for traps
       * This is for chests, where the rune is in the chests inventory.
       */
      for (tmp2 = tmp->inv; tmp2 != NULL; tmp2 = tmp2->below)
        {
          if (tmp2->type == RUNE || tmp2->type == TRAP)
            {
              tmp = tmp2;
              searchflag = 0;
              break;
            }
        }
      if (!searchflag)
        break;
    }

  /* no rune there. */
  if (tmp == NULL)
    {
      new_draw_info (NDI_UNIQUE, 0, op, "There's nothing there!");
      return 0;
    }
  trap_disarm (op, tmp, 0, skill);
  return 1;

}

int
trap_see (object *op, object *trap)
{
  int chance;

  chance = random_roll (0, 99, op, PREFER_HIGH);;

  /*  decide if we see the rune or not */
  if ((trap->stats.Cha == 1) || (chance > MIN (95, MAX (5, ((int) ((float) (op->map->difficulty
                                                                            + trap->level + trap->stats.Cha - op->level) / 10.0 * 50.0))))))
    {
      new_draw_info_format (NDI_UNIQUE, 0, op, "You spot a %s!", &trap->name);
      return 1;
    }
  return 0;
}

int
trap_show (object *trap, object *where)
{
  object *tmp2;

  if (where == NULL)
    return 0;
  tmp2 = get_archetype ("runedet");
  tmp2->face = &new_faces[GET_ANIMATION (trap, 0)];
  tmp2->x = where->x;
  tmp2->y = where->y;
  tmp2->map = where->map;
  insert_ob_in_map (tmp2, where->map, NULL, 0);
  return 1;

}


int
trap_disarm (object *disarmer, object *trap, int risk, object *skill)
{
  int trapworth;                /* need to compute the experience worth of the trap
                                   before we kill it */

  /* this formula awards a more reasonable amount of exp */
  trapworth = MAX (1, trap->level) * disarmer->map->difficulty *
    sqr (MAX (trap->stats.dam, trap->inv ? trap->inv->level : 1)) / skill->level;

  if (!(random_roll (0, (MAX (2, MIN (20, trap->level - skill->level + 5 - disarmer->stats.Dex / 2)) - 1), disarmer, PREFER_LOW)))
    {
      new_draw_info_format (NDI_UNIQUE, 0, disarmer, "You successfully disarm the %s!", &trap->name);
      destroy_object (trap);
      /* If it is your own trap, (or any players trap), don't you don't
       * get exp for it.
       */
      if (trap->owner && trap->owner->type != PLAYER && risk)
        return trapworth;
      else
        return 1;               /* give minimal exp and say success */
    }
  else
    {
      new_draw_info_format (NDI_UNIQUE, 0, disarmer, "You fail to disarm the %s.", &trap->name);
      if (!(random_roll (0, (MAX (2, skill->level - trap->level + disarmer->stats.Dex / 2 - 6)) - 1, disarmer, PREFER_LOW)) && risk)
        {
          new_draw_info (NDI_UNIQUE, 0, disarmer, "In fact, you set it off!");
          spring_trap (trap, disarmer);
        }
      return 0;
    }
}


/*  traps need to be adjusted for the difficulty of the map.  The
 * default traps are too strong for wimpy level 1 players, and 
 * unthreatening to anyone of high level 
 */

void
trap_adjust (object *trap, int difficulty)
{
  int i;

  /* now we set the trap level to match the difficulty of the level
   * the formula below will give a level from 1 to (2*difficulty) with 
   * a peak probability at difficulty 
   */

  trap->level = rndm (0, difficulty - 1) + rndm (0, difficulty - 1);
  if (trap->level < 1)
    trap->level = 1;

  /* set the hiddenness of the trap, similar formula to above */
  trap->stats.Cha = rndm (0, 19) + rndm (0, difficulty - 1) + rndm (0, difficulty - 1);

  if (!trap->other_arch && !trap->inv)
    {
      /* set the damage of the trap.
       * we get 0-4 pts of damage per level of difficulty of the map in
       * the trap
       */

      trap->stats.dam = 0;
      for (i = 0; i < difficulty; i++)
        trap->stats.dam += rndm (0, 4);

      /*  the poison trap special case */
      if (trap->attacktype & AT_POISON)
        {
          trap->stats.dam = rndm (0, difficulty - 1);
          if (trap->stats.dam < 1)
            trap->stats.dam = 1;
        }

      /*  so we get an appropriate amnt of exp for AT_DEATH traps */
      if (trap->attacktype & AT_DEATH)
        trap->stats.dam = 127;
    }

}
Revision:	1.6
Committed:	Thu Sep 14 23:13:49 2006 UTC (17 years, 8 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.5:	+6 -6 lines
Log Message:	replace was_destroyed by much simpler and less expensive ->destroyed, which is valid, as objetc pointers are now reliable.
#	User	Rev	Content
1	elmex	1.1	/*
2			CrossFire, A Multiplayer game for X-windows
3
4			Copyright (C) 2003 Mark Wedel & Crossfire Development Team
5			Copyright (C) 1992 Frank Tore Johansen
6
7			This program is free software; you can redistribute it and/or modify
8			it under the terms of the GNU General Public License as published by
9			the Free Software Foundation; either version 2 of the License, or
10			(at your option) any later version.
11
12			This program is distributed in the hope that it will be useful,
13			but WITHOUT ANY WARRANTY; without even the implied warranty of
14			MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15			GNU General Public License for more details.
16
17			You should have received a copy of the GNU General Public License
18			along with this program; if not, write to the Free Software
19			Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20
21	root	1.5	The authors can be reached via e-mail at <crossfire@schmorp.de>
22	elmex	1.1	*/
23
24			#include <global.h>
25			#ifndef __CEXTRACT__
26	root	1.4	# include <sproto.h>
27	elmex	1.1	#endif
28			#include <spells.h>
29
30
31			#ifndef sqr
32	root	1.4	# define sqr(x) ((x)*(x))
33	elmex	1.1	#endif
34
35
36			/* peterm:
37			* write_rune:
38			* op: rune writer
39			* skop: skill object used for casting this rune
40			* dir: orientation of rune, direction rune's contained spell will
41			* be cast in, if applicable
42			* inspell: spell object to put into the rune, can be null if doing
43			* a marking rune.
44			* level: level of casting of the rune
45			* runename: name of the rune or message displayed by the rune for
46			* a rune of marking
47			*/
48
49	root	1.4	int
50			write_rune (object op, object caster, object spell, int dir, const char runename)
51			{
52			object tmp, rune_spell, *rune;
53			char buf[MAX_BUF];
54			mapstruct *m;
55			sint16 nx, ny;
56
57			if (!dir)
58			{
59			dir = 1;
60			}
61
62			nx = op->x + freearr_x[dir];
63			ny = op->y + freearr_y[dir];
64			m = op->map;
65
66			if (get_map_flags (m, &m, nx, ny, &nx, &ny))
67			{
68			new_draw_info (NDI_UNIQUE, 0, op, "Can't make a rune there!");
69			return 0;
70	elmex	1.1	}
71	root	1.4	for (tmp = get_map_ob (m, nx, ny); tmp != NULL; tmp = tmp->above)
72			if (tmp->type == RUNE)
73			break;
74
75			if (tmp)
76			{
77			new_draw_info (NDI_UNIQUE, 0, op, "You can't write a rune there.");
78	elmex	1.1	return 0;
79			}
80
81	root	1.4	if (spell->other_arch)
82			{
83			rune_spell = arch_to_object (spell->other_arch);
84			}
85			else
86			{
87			/* Player specified spell. The player has to know the spell, so
88			* lets just look through the players inventory see if they know it
89			* use the item_matched_string for our typical matching method.
90			*/
91			int bestmatch = 0, ms;
92
93			if (!runename \|\| *runename == 0)
94			{
95			new_draw_info (NDI_UNIQUE, 0, op, "Write a rune of what?");
96			return 0;
97			}
98
99			rune_spell = NULL;
100			for (tmp = op->inv; tmp; tmp = tmp->below)
101			{
102			if (tmp->type == SPELL)
103			{
104			ms = item_matched_string (op, tmp, runename);
105			if (ms > bestmatch)
106			{
107			bestmatch = ms;
108			rune_spell = tmp;
109	root	1.2	}
110			}
111			}
112	root	1.4	if (!rune_spell)
113			{
114			new_draw_info_format (NDI_UNIQUE, 0, op, "You don't know any spell named %s", runename);
115			return 0;
116			}
117			if (rune_spell->skill != spell->skill)
118			{
119			new_draw_info_format (NDI_UNIQUE, 0, op, "You can't cast %s with %s", &rune_spell->name, &spell->name);
120			return 0;
121			}
122			if (caster->path_denied & spell->path_attuned)
123			{
124			new_draw_info_format (NDI_UNIQUE, 0, op, "%s belongs to a spell path denied to you.", &rune_spell->name);
125			return 0;
126			}
127			if (caster_level (caster, rune_spell) < rune_spell->level)
128			{
129			new_draw_info_format (NDI_UNIQUE, 0, op, "%s is beyond your ability to cast!", &rune_spell->name);
130			return 0;
131			}
132			if (SP_level_spellpoint_cost (caster, rune_spell, SPELL_MANA) > op->stats.sp)
133			{
134			new_draw_info (NDI_UNIQUE, 0, op, "You don't have enough mana.");
135			return 0;
136			}
137			if (SP_level_spellpoint_cost (caster, rune_spell, SPELL_GRACE) > op->stats.grace)
138			{
139			new_draw_info (NDI_UNIQUE, 0, op, "You don't have enough grace.");
140			return 0;
141			}
142			op->stats.grace -= SP_level_spellpoint_cost (caster, rune_spell, SPELL_GRACE);
143			op->stats.sp -= SP_level_spellpoint_cost (caster, rune_spell, SPELL_MANA);
144			}
145			/* already proper rune. Note this should only be the case if other_arch was set */
146			if (rune_spell->type == RUNE)
147			{
148			rune = rune_spell;
149			}
150			else
151			{
152			rune = get_archetype (GENERIC_RUNE);
153			sprintf (buf, "You set off a rune of %s\n", &rune_spell->name);
154			rune->msg = buf;
155			tmp = get_object ();
156			copy_object (rune_spell, tmp);
157			insert_ob_in_ob (tmp, rune);
158			if (spell->face != blank_face)
159			rune->face = spell->face;
160			}
161			rune->level = caster_level (caster, spell);
162			rune->stats.Cha = rune->level / 2; /* the invisibility parameter */
163			rune->x = nx;
164			rune->y = ny;
165			rune->map = m;
166			rune->direction = dir; /* where any spell will go upon detonation */
167			set_owner (rune, op); /* runes without need no owner */
168			set_spell_skill (op, caster, spell, rune);
169			insert_ob_in_map (rune, m, op, 0);
170			return 1;
171	elmex	1.1
172			}
173
174
175
176			/* move_rune: peterm
177			comments on runes:
178			rune->level : level at which rune will cast its spell.
179			rune->hp : number of detonations before rune goes away
180			rune->msg : message the rune displays when it goes off
181			rune->direction : direction it will cast a spell in
182			rune->dam : damage the rune will do if it doesn't cast spells
183			rune->attacktype: type of damage it does, if not casting spells
184			rune->other_arch: spell in the rune
185			rune->Cha : how hidden the rune is
186			rune->maxhp : number of spells the rune casts
187			*/
188
189	root	1.4	void
190			move_rune (object *op)
191			{
192			int det = 0;
193
194			if (!op->level)
195			{
196			return;
197			} /* runes of level zero cannot detonate. */
198			det = op->invisible;
199			if (!(rndm (0, MAX (1, (op->stats.Cha)) - 1)))
200			{
201			op->invisible = 0;
202			op->speed_left -= 1;
203			}
204			else
205			op->invisible = 1;
206			if (op->invisible != det)
207			update_object (op, UP_OBJ_FACE);
208	elmex	1.1	}
209
210
211			/* peterm: rune_attack
212			* function handles those runes which detonate but do not cast spells.
213			*/
214
215
216	root	1.4	void
217			rune_attack (object op, object victim)
218	elmex	1.1	{
219	root	1.4	if (victim)
220			{
221	root	1.6	hit_player (victim, op->stats.dam, op, op->attacktype, 1);
222	root	1.4
223	root	1.6	if (victim->destroyed ())
224	root	1.4	return;
225	root	1.6
226	root	1.4	/* if there's a disease in the needle, put it in the player */
227			if (HAS_RANDOM_ITEMS (op))
228			create_treasure (op->randomitems, op, 0, (victim->map ? victim->map->difficulty : 1), 0);
229	root	1.6
230	root	1.4	if (op->inv && op->inv->type == DISEASE)
231			{
232			object *disease = op->inv;
233
234			infect_object (victim, disease, 1);
235			remove_ob (disease);
236			free_object (disease);
237			}
238	elmex	1.1	}
239	root	1.4	else
240			hit_map (op, 0, op->attacktype, 1);
241	elmex	1.1	}
242
243			/* This function generalizes attacks by runes/traps. This ought to make
244			* it possible for runes to attack from the inventory,
245			* it'll spring the trap on the victim.
246			*/
247	root	1.4	void
248			spring_trap (object trap, object victim)
249	elmex	1.1	{
250	root	1.4	object *env;
251			rv_vector rv;
252			int i;
253
254			/* Prevent recursion */
255			if (trap->stats.hp <= 0)
256			return;
257
258			if (QUERY_FLAG (trap, FLAG_IS_LINKED))
259			use_trigger (trap);
260
261			/* Only living objects can trigger runes that don't cast spells, as
262			* doing direct damage to a non-living object doesn't work anyway.
263			* Typical example is an arrow attacking a door.
264			*/
265			if (!QUERY_FLAG (victim, FLAG_ALIVE) && !trap->inv && !trap->other_arch)
266			return;
267
268			trap->stats.hp--; /decrement detcount /
269
270			if (victim && victim->type == PLAYER)
271			new_draw_info (NDI_UNIQUE, 0, victim, trap->msg);
272
273			/* Flash an image of the trap on the map so the poor sod
274			* knows what hit him.
275			*/
276			env = object_get_env_recursive (trap);
277
278			/* If the victim is not next to this trap, don't set it off.
279			* players shouldn't get hit by firing arrows at a door for example.
280			* At the same time, the trap will stick around until detonated
281			*/
282			get_rangevector (env, victim, &rv, 0);
283			if (rv.distance > 1)
284			return;
285
286			trap_show (trap, env);
287
288			/* Only if it is a spell do we proceed here */
289			if ((trap->inv && trap->inv->type == SPELL) \|\| (trap->other_arch && trap->other_arch->clone.type == SPELL))
290			{
291	elmex	1.1
292	root	1.6	if (trap->destroyed ())
293	root	1.2	return;
294	elmex	1.1
295	root	1.4	// breaks summon golem spells, which, for inexplicable reasons,
296			// do not work like summon golem spells at all but still require
297			// direction "0" to work at all.
298			//if (trap->direction)
299			// rv.direction = trap->direction;
300	elmex	1.1
301	root	1.4	for (i = 0; i < MAX (1, trap->stats.maxhp); i++)
302			{
303			if (trap->inv)
304			cast_spell (env, trap, trap->direction, trap->inv, NULL);
305			else
306			{
307			object *spell = arch_to_object (trap->other_arch);
308	elmex	1.1
309	root	1.4	cast_spell (env, trap, trap->direction, spell, NULL);
310			free_object (spell);
311	root	1.2	}
312			}
313	root	1.4	}
314			else
315			{
316			rune_attack (trap, victim);
317	root	1.6	if (trap->destroyed ())
318	root	1.4	return;
319	elmex	1.1	}
320
321	root	1.4	if (trap->stats.hp <= 0)
322			{
323			trap->type = SIGN; /* make the trap impotent */
324			trap->stats.food = 20; /* make it stick around until its spells are gone */
325			SET_FLAG (trap, FLAG_IS_USED_UP);
326	elmex	1.1	}
327			}
328
329			/* dispel_rune: by peterm
330			* dispels the target rune, depending on the level of the actor
331			* and the level of the rune risk flag, if true, means that there is
332			* a chance that the trap/rune will detonate
333			*/
334	root	1.4	int
335			dispel_rune (object op, object caster, object spell, object skill, int dir)
336	elmex	1.1	{
337	root	1.4	object tmp, tmp2;
338			int searchflag = 1, mflags;
339			sint16 x, y;
340			mapstruct *m;
341
342			x = op->x + freearr_x[dir];
343			y = op->y + freearr_y[dir];
344			m = op->map;
345
346			mflags = get_map_flags (m, &m, x, y, &x, &y);
347
348			/* Should we perhaps not allow player to disable traps if a monster/
349			* player is standing on top?
350			*/
351			if (mflags & P_OUT_OF_MAP)
352			{
353			new_draw_info (NDI_UNIQUE, 0, op, "There's nothing there!");
354			return 0;
355			}
356
357			for (tmp = get_map_ob (m, x, y); tmp != NULL; tmp = tmp->above)
358			{
359			if (tmp->type == RUNE \|\| tmp->type == TRAP)
360			break;
361
362			/* we could put a probability chance here, but since nothing happens
363			* if you fail, no point on that. I suppose we could do a level
364			* comparison so low level players can't erase high level players runes.
365			*/
366			if (tmp->type == SIGN && !strcmp (tmp->arch->name, "rune_mark"))
367			{
368			remove_ob (tmp);
369			free_object (tmp);
370			new_draw_info (NDI_UNIQUE, 0, op, "You wipe out the rune of marking!");
371			return 1;
372			}
373
374			/* now search tmp's inventory for traps
375			* This is for chests, where the rune is in the chests inventory.
376			*/
377			for (tmp2 = tmp->inv; tmp2 != NULL; tmp2 = tmp2->below)
378			{
379			if (tmp2->type == RUNE \|\| tmp2->type == TRAP)
380			{
381			tmp = tmp2;
382			searchflag = 0;
383			break;
384	root	1.2	}
385			}
386	root	1.4	if (!searchflag)
387			break;
388	elmex	1.1	}
389	root	1.4
390			/* no rune there. */
391			if (tmp == NULL)
392			{
393			new_draw_info (NDI_UNIQUE, 0, op, "There's nothing there!");
394			return 0;
395			}
396			trap_disarm (op, tmp, 0, skill);
397			return 1;
398
399	elmex	1.1	}
400
401	root	1.4	int
402			trap_see (object op, object trap)
403			{
404			int chance;
405
406			chance = random_roll (0, 99, op, PREFER_HIGH);;
407	elmex	1.1
408	root	1.4	/* decide if we see the rune or not */
409			if ((trap->stats.Cha == 1) \|\| (chance > MIN (95, MAX (5, ((int) ((float) (op->map->difficulty
410			+ trap->level + trap->stats.Cha - op->level) / 10.0 * 50.0))))))
411			{
412			new_draw_info_format (NDI_UNIQUE, 0, op, "You spot a %s!", &trap->name);
413			return 1;
414	elmex	1.1	}
415	root	1.4	return 0;
416	elmex	1.1	}
417
418	root	1.4	int
419			trap_show (object trap, object where)
420			{
421			object *tmp2;
422	elmex	1.1
423	root	1.4	if (where == NULL)
424			return 0;
425			tmp2 = get_archetype ("runedet");
426			tmp2->face = &new_faces[GET_ANIMATION (trap, 0)];
427			tmp2->x = where->x;
428			tmp2->y = where->y;
429			tmp2->map = where->map;
430			insert_ob_in_map (tmp2, where->map, NULL, 0);
431			return 1;
432	elmex	1.1
433			}
434
435
436	root	1.4	int
437			trap_disarm (object disarmer, object trap, int risk, object *skill)
438			{
439			int trapworth; /* need to compute the experience worth of the trap
440			before we kill it */
441
442			/* this formula awards a more reasonable amount of exp */
443			trapworth = MAX (1, trap->level) * disarmer->map->difficulty *
444			sqr (MAX (trap->stats.dam, trap->inv ? trap->inv->level : 1)) / skill->level;
445
446			if (!(random_roll (0, (MAX (2, MIN (20, trap->level - skill->level + 5 - disarmer->stats.Dex / 2)) - 1), disarmer, PREFER_LOW)))
447			{
448			new_draw_info_format (NDI_UNIQUE, 0, disarmer, "You successfully disarm the %s!", &trap->name);
449			destroy_object (trap);
450			/* If it is your own trap, (or any players trap), don't you don't
451			* get exp for it.
452			*/
453			if (trap->owner && trap->owner->type != PLAYER && risk)
454			return trapworth;
455			else
456			return 1; /* give minimal exp and say success */
457			}
458			else
459			{
460			new_draw_info_format (NDI_UNIQUE, 0, disarmer, "You fail to disarm the %s.", &trap->name);
461			if (!(random_roll (0, (MAX (2, skill->level - trap->level + disarmer->stats.Dex / 2 - 6)) - 1, disarmer, PREFER_LOW)) && risk)
462			{
463			new_draw_info (NDI_UNIQUE, 0, disarmer, "In fact, you set it off!");
464			spring_trap (trap, disarmer);
465	elmex	1.1	}
466	root	1.4	return 0;
467			}
468	elmex	1.1	}
469
470
471			/* traps need to be adjusted for the difficulty of the map. The
472			* default traps are too strong for wimpy level 1 players, and
473			* unthreatening to anyone of high level
474			*/
475
476	root	1.4	void
477			trap_adjust (object *trap, int difficulty)
478			{
479			int i;
480	elmex	1.1
481	root	1.4	/* now we set the trap level to match the difficulty of the level
482			* the formula below will give a level from 1 to (2*difficulty) with
483			* a peak probability at difficulty
484			*/
485
486			trap->level = rndm (0, difficulty - 1) + rndm (0, difficulty - 1);
487			if (trap->level < 1)
488			trap->level = 1;
489
490			/* set the hiddenness of the trap, similar formula to above */
491			trap->stats.Cha = rndm (0, 19) + rndm (0, difficulty - 1) + rndm (0, difficulty - 1);
492
493			if (!trap->other_arch && !trap->inv)
494			{
495			/* set the damage of the trap.
496			* we get 0-4 pts of damage per level of difficulty of the map in
497			* the trap
498			*/
499
500			trap->stats.dam = 0;
501			for (i = 0; i < difficulty; i++)
502			trap->stats.dam += rndm (0, 4);
503
504			/* the poison trap special case */
505			if (trap->attacktype & AT_POISON)
506			{
507			trap->stats.dam = rndm (0, difficulty - 1);
508			if (trap->stats.dam < 1)
509			trap->stats.dam = 1;
510	root	1.2	}
511	elmex	1.1
512	root	1.4	/* so we get an appropriate amnt of exp for AT_DEATH traps */
513			if (trap->attacktype & AT_DEATH)
514			trap->stats.dam = 127;
515	elmex	1.1	}
516
517			}